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首页> 外文期刊>International journal of hydrogen energy >Effect of water concentration in the anode catalyst layer on the performance of direct methanol fuel cells operating with neat methanol
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Effect of water concentration in the anode catalyst layer on the performance of direct methanol fuel cells operating with neat methanol

机译：阳极催化剂层中水浓度对使用纯甲醇运行的直接甲醇燃料电池性能的影响

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摘要

This paper reports on a chromatography-based method for determining the water concentration in the anode catalyst layer (CL) of a direct methanol fuel cell (DMFC). By this method, the effect of the water concentration in the anode CL on the product distribution of the methanol oxidation reaction (MOR), the anode potential, and the cell internal resistance is experimentally investigated in a DMFC operating with neat methanol. Interestingly, it is found that the main product of the anode MOR is still carbon dioxide even when the water concentration in the anode CL is extremely low. The experimental data also show that an increase in the water concentration in the anode CL decreases the internal resistance, the production of by-products (methyl formate and methylal), and the anode potential. As the mole ratio of water to methanol increases beyond a critical value, however, both the internal resistance and the anode potential tend to be stabilized at the points under diluted methanol operating conditions.
机译：本文报道了一种基于色谱的方法，用于确定直接甲醇燃料电池（DMFC）的阳极催化剂层（CL）中的水浓度。通过这种方法，在使用纯甲醇的DMFC中实验研究了阳极CL中水浓度对甲醇氧化反应（MOR）的产物分布，阳极电势和电池内部电阻的影响。有趣的是，发现即使当阳极CL中的水浓度极低时，阳极MOR的主要产物仍然是二氧化碳。实验数据还表明，阳极CL中水浓度的增加会降低内部电阻，副产物（甲酸甲酯和甲缩醛）的产生以及阳极电位。然而，当水与甲醇的摩尔比增加到超过临界值时，在稀释的甲醇操作条件下，内部电阻和阳极电位都趋于稳定在该点。

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  • 来源
    《International journal of hydrogen energy》 |2012年第7期|p.5958-5968|共11页
  • 作者

    Q.X. Wu; S.Y. Shen; Y.L. He; T.S. Zhao;

  • 作者单位

    Department of Mechanical Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China;

    Department of Mechanical Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China;

    Key Laboratory of Thermo-Fluid Science and Engineering of MOE, State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China;

    Department of Mechanical Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China ,Key Laboratory of Thermo-Fluid Science and Engineering of MOE, State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    fuel cells; direct methanol fuel cells; neat methanol; water concentration;

    机译：燃料电池;直接甲醇燃料电池;纯甲醇水浓度;

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